A video tweeted out by the university’s entomology department shows the fire ants creating an ant raft at UF’s Natural Area Teaching Laboratory.

An ant raft is a mechanism used by ants to avoid drowning in floods, according to Live Science. The large grouping of linked ants, which takes a little under two minutes to form, creates a water-repellent grouping that allows the entire group to float above floodwaters, according to Live Science.

Though likely impossible to quantify, the video posted on Twitter shows a massive gathering on ants floating above water.